Mill Creek Dam Weather Records (USC00455387)

Record envelope, standing records and threshold days for Mill Creek Dam (USC00455387), Washington, United States, with 79 years of record.

Key Facts for Mill Creek Dam

Mill Creek Dam (USC00455387) is a weather station in Washington, United States at 46.08 latitude and -118.27 longitude, 359 m (1,178 ft) above sea level.
The station reports from 1948 to 2026, 79 years of record.
0 records set at Mill Creek Dam still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mill Creek Dam set a daily record precipitation of 8.1 mm (0.32 in) on 3 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Washington, United States, 46.08 latitude, -118.27 longitude.
Elevation: 359 m (1,178 ft).
Period of record: 1948 to 2026, 79 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Mill Creek Dam. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Mill Creek Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Mill Creek Dam still stand.

All-Time Record Progression

5 new records

5 all-time records were set at Mill Creek Dam between 8 February 1985 and 22 December 2008. Each dot is a new record.

When Mill Creek Dam set new all-time records
Date	Kind	Detail
1985-02-08	Record daily snowfall	Record daily snowfall 22.9 cm (9.0 in)
1985-11-20	Record daily snowfall	Record daily snowfall 25.4 cm (10.0 in)
1992-07-23	Record daily precipitation	Record daily precipitation 53.3 mm (2.1 in)
2008-12-19	Record snow depth	Record snow depth 48.3 cm (19.0 in)
2008-12-22	Record snow depth	Record snow depth 63.5 cm (25.0 in)

Wettest Day of Each Month

Jul: 53.3 mm (2.1 in)

The wettest day on record for each calendar month at Mill Creek Dam. The most was 53.3 mm (2.1 in) on 23 July 1992.

Record daily precipitation for each month at Mill Creek Dam
Month	Record daily precipitation (mm)	Date
Jan	40.6 mm (1.6 in)	2 January 2009
Feb	33.8 mm (1.3 in)	13 February 1970
Mar	30.7 mm (1.2 in)	13 March 1972
Apr	36.1 mm (1.4 in)	7 April 1969
May	47.2 mm (1.9 in)	31 May 2000
Jun	37.6 mm (1.5 in)	13 June 2022
Jul	53.3 mm (2.1 in)	23 July 1992
Aug	36.6 mm (1.4 in)	30 August 1977
Sep	32.3 mm (1.3 in)	2 September 1971
Oct	46.2 mm (1.8 in)	10 October 1955
Nov	50.8 mm (2.0 in)	1 November 1994
Dec	38.1 mm (1.5 in)	12 December 2009

Latest Records

Latest records at Mill Creek Dam
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
3 September 2026	Mill Creek Dam, US	daily rain (Provisional)	8.1 mm (0.32 in)	1.5 mm (0.06 in)	61 years	20 of 100 (Routine)
23 April 2026	Mill Creek Dam, US	daily rain	30.7 mm (1.2 in)	13.4 mm (0.5 in)	28 years	40 of 100 (Notable)
13 April 2026	Mill Creek Dam, US	daily rain	21.6 mm (0.9 in)	7.9 mm (0.31 in)	72 years	20 of 100 (Routine)
5 March 2026	Mill Creek Dam, US	daily rain	12.4 mm (0.5 in)	4.8 mm (0.19 in)	44 years	20 of 100 (Routine)
19 February 2025	Mill Creek Dam, US	daily rain	22.9 mm (0.9 in)	2.3 mm (0.09 in)	57 years	20 of 100 (Routine)
14 February 2025	Mill Creek Dam, US	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	45 years	25 of 100 (Routine)
6 January 2025	Mill Creek Dam, US	daily rain	31.8 mm (1.3 in)	1.6 mm (0.06 in)	56 years	26 of 100 (Routine)
26 December 2024	Mill Creek Dam, US	daily rain	33.0 mm (1.3 in)	4.8 mm (0.19 in)	28 years	24 of 100 (Routine)
13 December 2024	Mill Creek Dam, US	daily snowfall	0.3 cm (0.1 in)	0.3 cm (0.1 in)	76 years	20 of 100 (Routine)
23 November 2024	Mill Creek Dam, US	daily rain	22.1 mm (0.9 in)	9.4 mm (0.37 in)	75 years	20 of 100 (Routine)
12 September 2024	Mill Creek Dam, US	daily rain	14.0 mm (0.6 in)	9.7 mm (0.38 in)	20 years	20 of 100 (Routine)
6 May 2024	Mill Creek Dam, US	daily rain	47.0 mm (1.9 in)	26.9 mm (1.1 in)	4 years	48 of 100 (Notable)
4 December 2023	Mill Creek Dam, US	daily rain	17.8 mm (0.7 in)	2.3 mm (0.09 in)	72 years	20 of 100 (Routine)
25 October 2023	Mill Creek Dam, US	daily rain	19.1 mm (0.8 in)	3.4 mm (0.13 in)	38 years	20 of 100 (Routine)
8 August 2023	Mill Creek Dam, US	daily rain	5.1 mm (0.20 in)	3.8 mm (0.15 in)	46 years	20 of 100 (Routine)
3 April 2023	Mill Creek Dam, US	monthly snowfall	6.9 cm (2.7 in)	3.9 cm (1.5 in)	0 years	24 of 100 (Routine)
3 April 2023	Mill Creek Dam, US	monthly snow depth	5.1 cm (2.0 in)	2.6 cm (1.0 in)	10 years	20 of 100 (Routine)
3 April 2023	Mill Creek Dam, US	daily rain	11.7 mm (0.5 in)	2.8 mm (0.11 in)	5 years	13 of 100 (Routine)
30 December 2022	Mill Creek Dam, US	daily rain	34.5 mm (1.4 in)	7.1 mm (0.28 in)	48 years	34 of 100 (Routine)
20 December 2022	Mill Creek Dam, US	daily snowfall	5.6 cm (2.2 in)	0.5 cm (0.2 in)	69 years	28 of 100 (Routine)

Extremes by Year

1948 to 2026

Yearly extremes at Mill Creek Dam: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	53.3 mm (2.1 in)	1992	28.2 mm (1.1 in)	79
Wettest five days (Rx5day)	78.5 mm (3.1 in)	1991	45.0 mm (1.8 in)	79
Longest dry spell (CDD)	89 days	2001	41 days	79

Wettest day (Rx1day)

The wettest day of the year at Mill Creek Dam, 1948 to 2026. The record is 53.3 mm (2.1 in) in 1992, marked on the chart; the median year is 28.2 mm (1.1 in).

Wettest day (Rx1day) at Mill Creek Dam by year
Year	Wettest day (Rx1day)
1948	14.7 mm (0.6 in)
1949	17.8 mm (0.7 in)
1950	34.0 mm (1.3 in)
1951	33.0 mm (1.3 in)
1952	20.3 mm (0.8 in)
1953	19.8 mm (0.8 in)
1954	21.8 mm (0.9 in)
1955	46.2 mm (1.8 in)
1956	25.1 mm (1.0 in)
1957	28.2 mm (1.1 in)
1958	31.5 mm (1.2 in)
1959	24.9 mm (1.0 in)
1960	24.4 mm (1.0 in)
1961	28.2 mm (1.1 in)
1962	29.2 mm (1.1 in)
1963	21.3 mm (0.8 in)
1964	22.9 mm (0.9 in)
1965	24.1 mm (0.9 in)
1966	47.5 mm (1.9 in)
1967	21.3 mm (0.8 in)
1968	32.3 mm (1.3 in)
1969	36.1 mm (1.4 in)
1970	38.9 mm (1.5 in)
1971	36.3 mm (1.4 in)
1972	30.7 mm (1.2 in)
1973	25.9 mm (1.0 in)
1974	27.4 mm (1.1 in)
1975	26.4 mm (1.0 in)
1976	32.5 mm (1.3 in)
1977	36.6 mm (1.4 in)
1978	31.8 mm (1.3 in)
1979	29.5 mm (1.2 in)
1980	30.5 mm (1.2 in)
1981	29.7 mm (1.2 in)
1982	35.6 mm (1.4 in)
1983	18.8 mm (0.7 in)
1984	38.1 mm (1.5 in)
1985	20.3 mm (0.8 in)
1986	25.4 mm (1.0 in)
1987	27.7 mm (1.1 in)
1988	33.0 mm (1.3 in)
1989	26.2 mm (1.0 in)
1990	29.0 mm (1.1 in)
1991	40.9 mm (1.6 in)
1992	53.3 mm (2.1 in)
1993	30.2 mm (1.2 in)
1994	50.8 mm (2.0 in)
1995	27.7 mm (1.1 in)
1996	43.2 mm (1.7 in)
1997	23.1 mm (0.9 in)
1998	15.0 mm (0.6 in)
1999	18.3 mm (0.7 in)
2000	47.2 mm (1.9 in)
2001	17.5 mm (0.7 in)
2002	21.3 mm (0.8 in)
2003	24.1 mm (0.9 in)
2004	24.9 mm (1.0 in)
2005	21.3 mm (0.8 in)
2006	36.8 mm (1.4 in)
2007	25.4 mm (1.0 in)
2008	22.9 mm (0.9 in)
2009	40.6 mm (1.6 in)
2010	29.2 mm (1.1 in)
2011	23.4 mm (0.9 in)
2012	22.1 mm (0.9 in)
2013	21.3 mm (0.8 in)
2014	21.3 mm (0.8 in)
2015	38.1 mm (1.5 in)
2016	21.1 mm (0.8 in)
2017	33.5 mm (1.3 in)
2018	26.4 mm (1.0 in)
2019	30.2 mm (1.2 in)
2020	41.1 mm (1.6 in)
2021	29.2 mm (1.1 in)
2022	37.6 mm (1.5 in)
2023	24.4 mm (1.0 in)
2024	47.0 mm (1.9 in)
2025	31.8 mm (1.3 in)
2026	30.7 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mill Creek Dam, 1948 to 2026. The record is 78.5 mm (3.1 in) in 1991, marked on the chart; the median year is 45.0 mm (1.8 in).

Wettest five days (Rx5day) at Mill Creek Dam by year
Year	Wettest five days (Rx5day)
1948	31.0 mm (1.2 in)
1949	33.7 mm (1.3 in)
1950	63.5 mm (2.5 in)
1951	69.8 mm (2.7 in)
1952	23.1 mm (0.9 in)
1953	51.6 mm (2.0 in)
1954	33.7 mm (1.3 in)
1955	50.6 mm (2.0 in)
1956	37.9 mm (1.5 in)
1957	57.8 mm (2.3 in)
1958	22.3 mm (0.9 in)
1959	34.3 mm (1.4 in)
1960	29.7 mm (1.2 in)
1961	30.0 mm (1.2 in)
1962	55.3 mm (2.2 in)
1963	38.6 mm (1.5 in)
1964	35.9 mm (1.4 in)
1965	29.7 mm (1.2 in)
1966	47.5 mm (1.9 in)
1967	33.8 mm (1.3 in)
1968	52.8 mm (2.1 in)
1969	55.6 mm (2.2 in)
1970	67.4 mm (2.7 in)
1971	46.8 mm (1.8 in)
1972	30.7 mm (1.2 in)
1973	41.4 mm (1.6 in)
1974	32.8 mm (1.3 in)
1975	57.8 mm (2.3 in)
1976	45.0 mm (1.8 in)
1977	54.2 mm (2.1 in)
1978	49.8 mm (2.0 in)
1979	39.7 mm (1.6 in)
1980	68.9 mm (2.7 in)
1981	58.9 mm (2.3 in)
1982	51.1 mm (2.0 in)
1983	41.4 mm (1.6 in)
1984	53.4 mm (2.1 in)
1985	29.2 mm (1.1 in)
1986	38.6 mm (1.5 in)
1987	35.5 mm (1.4 in)
1988	58.4 mm (2.3 in)
1989	39.1 mm (1.5 in)
1990	50.2 mm (2.0 in)
1991	78.5 mm (3.1 in)
1992	72.8 mm (2.9 in)
1993	46.5 mm (1.8 in)
1994	35.9 mm (1.4 in)
1995	41.9 mm (1.6 in)
1996	61.2 mm (2.4 in)
1997	47.7 mm (1.9 in)
1998	29.5 mm (1.2 in)
1999	29.3 mm (1.2 in)
2000	64.5 mm (2.5 in)
2001	28.5 mm (1.1 in)
2002	21.3 mm (0.8 in)
2003	45.0 mm (1.8 in)
2004	47.0 mm (1.9 in)
2005	46.5 mm (1.8 in)
2006	63.9 mm (2.5 in)
2007	31.2 mm (1.2 in)
2008	28.7 mm (1.1 in)
2009	72.7 mm (2.9 in)
2010	45.4 mm (1.8 in)
2011	35.9 mm (1.4 in)
2012	44.4 mm (1.7 in)
2013	31.5 mm (1.2 in)
2014	32.6 mm (1.3 in)
2015	48.3 mm (1.9 in)
2016	32.6 mm (1.3 in)
2017	33.6 mm (1.3 in)
2018	45.9 mm (1.8 in)
2019	52.6 mm (2.1 in)
2020	63.7 mm (2.5 in)
2021	18.0 mm (0.7 in)
2022	76.2 mm (3.0 in)
2023	28.7 mm (1.1 in)
2024	48.8 mm (1.9 in)
2025	54.4 mm (2.1 in)
2026	53.0 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mill Creek Dam, 1948 to 2026. The record is 89 days in 2001, marked on the chart; the median year is 41 days.

Longest dry spell (CDD) at Mill Creek Dam by year
Year	Longest dry spell (CDD)
1948	25 days
1949	41 days
1950	34 days
1951	56 days
1952	65 days
1953	65 days
1954	36 days
1955	48 days
1956	33 days
1957	59 days
1958	80 days
1959	43 days
1960	44 days
1961	79 days
1962	53 days
1963	32 days
1964	20 days
1965	32 days
1966	46 days
1967	75 days
1968	24 days
1969	85 days
1970	28 days
1971	21 days
1972	24 days
1973	32 days
1974	83 days
1975	35 days
1976	26 days
1977	43 days
1978	38 days
1979	56 days
1980	38 days
1981	54 days
1982	25 days
1983	26 days
1984	61 days
1985	52 days
1986	42 days
1987	67 days
1988	64 days
1989	30 days
1990	30 days
1991	76 days
1992	28 days
1993	50 days
1994	58 days
1995	23 days
1996	77 days
1997	35 days
1998	42 days
1999	46 days
2000	57 days
2001	89 days
2002	53 days
2003	63 days
2004	38 days
2005	82 days
2006	63 days
2007	30 days
2008	30 days
2009	56 days
2010	34 days
2011	43 days
2012	43 days
2013	34 days
2014	15 days
2015	30 days
2016	18 days
2017	40 days
2018	66 days
2019	38 days
2020	24 days
2021	20 days
2022	35 days
2023	34 days
2024	65 days
2025	20 days
2026	28 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

52 years, 1949 to 2020

A day with at least 28.6 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 57.0 mm (2.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Mill Creek Dam: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	28.6 mm (1.1 in)
5 years	36.9 mm (1.5 in)
10 years	42.1 mm (1.7 in)
25 years	48.3 mm (1.9 in)
50 years	52.7 mm (2.1 in)
100 years	57.0 mm (2.2 in)	Longer than the 52 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 52 years of values from 1949 to 2020.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 53.3 mm (2.1 in) in 1992; 47.5 mm (1.9 in) in 1966; 47.2 mm (1.9 in) in 2000.

Download the Data

Data for Mill Creek Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mill Creek Dam threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a